What does census mean?
A census is an official, systematic count of a population, typically conducted by a government at regular intervals to gather data on demographics such as age, sex, occupation, housing, and household composition. Beyond its most familiar sense as a national headcount — like the decennial United States Census or the UK Census — the word is also applied more broadly to any careful, comprehensive tally of a defined set of things, whether businesses, wildlife populations, or library holdings. The term carries a formal, institutional register and is closely associated with statistics, public policy, and social science research. Its plural form is censuses. Because census data shapes everything from political representation to funding allocation, the word often appears in discussions of governance and planning. It should not be confused with consensus, which refers to collective agreement rather than numerical counting.
nounAn official count or survey of a population, typically recording details such as age, occupation, and housing. More broadly, any systematic count of a particular group or set of items.
- An official periodic count and survey of a country's population.
- Any official or systematic enumeration of a defined group, such as businesses or wildlife.
"The national census revealed that the population had grown by nearly ten percent in a single decade."
"According to the 2020 census, the town's population had doubled since the previous decade."
"Researchers conducted a census of nesting seabirds across the remote island colony."
The plural is formed regularly with -es. It appears mainly in comparative or historical contexts referring to multiple counts.
"Comparing successive censuses shows clear patterns of urban migration."
The word census comes straight from ancient Rome — Roman censors didn't just count citizens, they also judged their moral conduct.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of census
The word census comes directly from Latin census, meaning 'a registration or assessment,' derived from censere, 'to assess or estimate.' In ancient Rome, the censor conducted a periodic registration of citizens and their property for taxation and military purposes, which gave the term its enduring association with official population counts. The English word was borrowed in the early modern period, with recorded use dating from around the early 17th century.
How census is actually used
Census is primarily used in formal, administrative, and statistical contexts. It is almost always singular when referring to a specific official count (e.g., 'the census'), though the plural 'censuses' is standard when referring to multiple counts over time.
Easily confused with census
A census is an official counting of a population, while consensus is general agreement among a group.